okay, so that is a thank you to krystal ball and steve kornacki, and coming up. if house republicans really do something crazy with the debt ceiling, will they do that? ezra klein answers that question next. >>> and on the one-month anniversary of the sandy hook elementary school shootings, the nra has released a video. the same group that blamed the violent video games for the massacre in newtown. >>> and scott brown's political future, more observers saying he won't run for senate. and as i said, corey booker, who has announced his intention to run for senator in new jersey. the problem is he may have to run against fellow democrat and current senator franken lautenberg, as far as we can tell, they agree on just about everything. corey booker will answer steve kornacki's questions and will get tonight's last word. ♪ ♪ ♪ hi dad. many years from now, when the subaru is theirs... hey. you missed a spot. ...i'll look back on this day and laugh. love. it's what makes a subaru, a subaru. . >>> so newark mayor cory booker has a problem, he wants to run for senat